March 2018 Project Report No. PR594 Arable Crop Disease Alert System Jon West, Gail Canning, Kevin King, Bart Fraaije, Stuart Wili Biointeractons and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ Burkard Manufacturing Co Ltd, Woodcock Hill Industrial Estate, Rickmansworth, WD3 1PJ This is the final report of a 36-month project (21120002-2140021) which started in April 2015. The work was funded by Burkard Manufacturing Co. Ltd, and a contract for £75,000 from AHDB Cereals & Oilseeds. While the Agriculture and Horticulture Development Board seeks to ensure that the information contained within this document is accurate at the time of printing, no warranty is given in respect thereof and, to the maximum extent permitted by law, the Agriculture and Horticulture Development Board accepts no liability for loss, damage or injury howsoever caused (including that caused by negligence) or suffered directly or indirectly in relation to information and opinions contained in or omitted from this document. Reference herein to trade names and proprietary products without stating that they are protected does not imply that they may be regarded as unprotected and thus free for general use. No endorsement of named products is intended, nor is any criticism implied of other alternative, but unnamed, products. AHDB Cereals & Oilseeds is a part of the Agriculture and Horticulture Development Board (AHDB).